Birthday Math Trick

Are you ready to spice up math class with this pretty cool birthday math trick!

This little math trick should make you
seem like a sort of math genius. Have fun with it. It will involve
some math calculations so be sure the person does the math correctly.

Note: Make sure you try this trick out for yourself first, using your own birthdate.

There is an example that follow the steps.

Add
18 to the month they were born

Multiply by 25

Subtract 333

Multiply by
8

Subtract 554

Divide by 2

Add their birth date

Multiply by 5

Add 692

Multiply
by 20

Add only the last two digits of their birth year

Subtract 32940 to
get their birthday!

Pretty Cool Math Stuff!

Here's an example below...

Let's suppose someone has a birthdate of August 22, 1964.

So we want
to use the format of month/day/year so this birthdate would be 08/22/64.

Notice we only used two digits for the year.

18 + 8 = 26

26 x 25 = 650

650 - 333 = 317

317 x 8 = 2536

2536 - 554 = 1982

1982 / 2 = 991

991 + 22 = 1013

1013 x 5 = 5065

5065 + 692 = 5757

5757 x 20 = 115140

115140 + 64 = 115204

1295204 - 32940 = 82264

And there you have it....8 22 64 which is the same as August 22nd, 1964!

If you enjoyed that trick you probably also like this bit of birthday math trivia. Also notice the next two links below will take you to the main math tricks and trivia pages.

Kids
don't want the same ol' boring math routine. So that's why keeping gthe math interesting and engaging with math tricks, puzzles , games, etc. we're helping to motivate students to think more positive about math. I mean, don't we usually feel good about the things if we're having fun?